<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>当背景图片过大时round取值的表现</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        .con {
            float: left;
            width: 33.333333%;
            height: 200px;
            box-sizing: border-box;
            border: 1px solid red;
            background-image: url(./img/soBig.png);
            text-align: center;
            line-height: 200px;
            color: white;
            font-weight: bold;
            font-size: 50px;
        }
    </style>
</head>
<body>
    <div class="con" style="background-repeat: repeat-x;">repeat-x</div>
    <div class="con" style="background-repeat: repeat-y;">repeat-y</div>
    <div class="con" style="background-repeat: repeat;">repeat</div>
    <div class="con" style="background-repeat: space;">space</div>
    <div class="con" style="background-repeat: round;">round</div>
    <div class="con" style="background-repeat: no-repeat;">no-repeat</div>
</body>
</html>